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United States Patent | 6,156,236 |
Hayashida ,   et al. | December 5, 2000 |
A conductive organopolysiloxane composition is provided which includes (A) 100 parts by weight of an organopolysiloxane; and (B) 0.1 to 800 parts by weight of a conductive material obtained by subjecting a member selected from the group consisting of a conductive metal, a conductive metal compound, a filler surface-treated with a conductive metal and a filler surface-treated with a conductive metal compound, to surface treatment with a compound selected from the group consisting of a compound represented by the formula (1) and a compound represented by the formula (2). ##STR1## wherein R.sup.1 represents --O-- or --NH--, and R.sup.2 represents a hydrogen atom or a phenyl group. This composition is useful for the formation of a silicone rubber having a sufficient electrical conductivity and also stably retainable of electrical conductivity almost without undergoing a change in electrical conductivity even in a high-temperature environment.
Inventors: | Hayashida; Osamu (Annaka, JP); Yoshida; Takeo (Annaka, JP); Shimizu; Toshihide (Urayasu, JP); Iida; Tamaki (Kiyose, JP) |
Assignee: | Shin-Etsu Chemical Co., Ltd. (Tokyo, JP) |
Appl. No.: | 272341 |
Filed: | March 19, 1999 |
Mar 20, 1998[JP] | 10-092580 |
Current U.S. Class: | 252/512; 252/513; 252/514; 252/518.1; 252/521.3; 524/86; 524/87; 524/89; 524/90; 524/91; 524/403; 524/413; 524/439; 524/440; 524/588; 544/115; 544/117; 544/338; 544/342; 546/26; 546/47; 546/48; 546/59; 546/60 |
Intern'l Class: | H01B 001/04; C08K 005/34; C08K 003/08; C07P 221/18; C07P 471/22 |
Field of Search: | 252/512,513,514,518.1,521.3 524/86,87,89,90,91,99,100,102,403,413,439,440,588 544/1,99,63,115,117,120,224,336,338,342 546/26,47,48,59,60 |
4145317 | Mar., 1979 | Sado et al. | 252/512. |
4759874 | Jul., 1988 | Gros | 252/512. |
5075038 | Dec., 1991 | Cole et al. | 252/514. |
5700398 | Dec., 1997 | Angelpoulos et al. | 252/500. |
5708123 | Jan., 1998 | Johannsen et al. | 528/229. |
6015509 | Jan., 2000 | Angelopoulos et al. | 252/500. |
Foreign Patent Documents | |||
0 653 463 | May., 1995 | EP. | |
57-8249 | Jan., 1982 | JP. |
TABLE 1 ______________________________________ Comparative Example 1 Example 1 ______________________________________ Organopolysiloxane (parts) 100 100 Sample A (parts) 500 Sample B (parts) 500 Initial volume resistivity (.OMEGA. .multidot. cm) 2.0 .times. 10.sup.-3 350 .times. 10.sup.-2 200.degree. C./4 hours 2.0 .times. 10.sup.-3 2.2 .times. 10.sup.-1 200.degree. C./24 hours 3.5 .times. 10.sup.-3 2.6 .times. 10.sup.3 200.degree. C./72 hours 5.5 .times. 10.sup.-3 2.0 .times. 10.sup.4 ______________________________________